Panic in Client::head with automatic GZIP decompression

[GyrosOfWar]

When using reqwest::Client to make a HEAD request with GZIP decompression enabled (which is the default), a panic happens in the library.

Code to reproduce:

use reqwest::Client;
fn main() {
    let url = "https://www.google.com/";
    let client = Client::new().unwrap();
    client.head(url).send();
}

Backtrace:

thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Error { repr: Custom(Custom { kind: UnexpectedEof, error: StringError("failed to fill whole buffer") }) }', /checkout/src/libcore/result.rs:859
stack backtrace:
   0: std::sys::imp::backtrace::tracing::imp::unwind_backtrace
             at /checkout/src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:49
   1: std::sys_common::backtrace::_print
             at /checkout/src/libstd/sys_common/backtrace.rs:71
   2: std::panicking::default_hook::{{closure}}
             at /checkout/src/libstd/sys_common/backtrace.rs:60
             at /checkout/src/libstd/panicking.rs:355
   3: std::panicking::default_hook
             at /checkout/src/libstd/panicking.rs:371
   4: std::panicking::rust_panic_with_hook
             at /checkout/src/libstd/panicking.rs:549
   5: std::panicking::begin_panic
             at /checkout/src/libstd/panicking.rs:511
   6: std::panicking::begin_panic_fmt
             at /checkout/src/libstd/panicking.rs:495
   7: rust_begin_unwind
             at /checkout/src/libstd/panicking.rs:471
   8: core::panicking::panic_fmt
             at /checkout/src/libcore/panicking.rs:69
   9: core::result::unwrap_failed
             at /checkout/src/libcore/macros.rs:29
  10: <core::result::Result<T, E>>::unwrap
             at /checkout/src/libcore/result.rs:737
  11: reqwest::client::Decoder::from_hyper_response
             at /home/martin/.cargo/registry/src/gh.neting.cc-1ecc6299db9ec823/reqwest-0.5.1/src/client.rs:458
  12: reqwest::client::RequestBuilder::send
             at /home/martin/.cargo/registry/src/gh.neting.cc-1ecc6299db9ec823/reqwest-0.5.1/src/client.rs:331
  13: main::bug_repro
             at ./src/main.rs:41
  14: main::main
             at ./src/main.rs:47
  15: std::panicking::try::do_call
             at /checkout/src/libstd/panicking.rs:454
  16: __rust_maybe_catch_panic
             at /checkout/src/libpanic_unwind/lib.rs:98
  17: std::rt::lang_start
             at /checkout/src/libstd/panicking.rs:433
             at /checkout/src/libstd/panic.rs:361
             at /checkout/src/libstd/rt.rs:57
  18: main
  19: __libc_start_main
  20: _start

Here's the debug log: log.txt
When I disable automatic decompression (client.gzip(false)), it works fine.